Curtiss Grymala

Adds an available widget to list various social media profiles. The following social media sites are included by default:
<ul>
<li>Facebook</li>
<li>Twitter</li>
<li>YouTube</li>
<li>LinkedIn</li>
<li>Google+</li>
<li>FriendFeed</li>
<li>Flickr</li>
</ul>
This plugin also includes a filter hook allowing you to extend the available services.
By default, this plugin outputs an unordered list (ul) with a class of <code>social-icons-list</code>. Each service is output as a list item (li) with the service name used as the HTML class attribute. Filters are available to allow you to change those HTML elements.

Social Icons Widget

A developer-friendly plugin that allows you to add a widget with links to various social media profiles.

arstropica

Developed at <a href='http://nci.com' rel="nofollow ugc">NCI</a>. 
The Social Media Icons Widget is a basic sidebar widget that displays icon links for the user’s social media profile URLs. 
The widget includes 28 different freeware icon sets with different combinations of icons.  The default icon set features all the icon types found in the other icon sets.
Icons may be ordered using drag/drop in the widget panel
It is also possible to create custom icon sets by adding a folder with the icons you want to appear in your sidebar.
<h4>Included Icons</h4>
Note: Not every icon set designer creates the full range of icons.
<ul>
<li>Facebook</li>
<li>Google+</li>
<li>Twitter</li>
<li>LinkedIn</li>
<li>Flickr</li>
<li>YouTube</li>
<li>Digg</li>
<li>Reddit</li>
<li>StumbleUpon</li>
<li>Buzz</li>
<li>Vimeo</li>
<li>WordPress</li>
<li>Yelp</li>
<li>RSS</li>
<li>Contact</li>
<li>Delicious</li>
<li>Website</li>
<li>GitHub</li>
<li>Goodreads</li>
</ul>
All included icons are 32px x 32px. 
Custom icons of any size may be used.
<h4>Included Icon Sets</h4>
<ul>
<li>3D Statuette</li>
<li>3D Vector</li>
<li>Breakthrough</li>
<li>Circular</li>
<li>Creatures</li>
<li>Default</li>
<li>Furry Cushion</li>
<li>Grass Textured</li>
<li>Ice Cubes</li>
<li>Latte Art</li>
<li>Moleskin</li>
<li>Old Paper</li>
<li>Painting</li>
<li>Paper</li>
<li>PC Monitor</li>
<li>Picasso</li>
<li>Puzzle Piece</li>
<li>Scientific</li>
<li>Simple Vector</li>
<li>Sleek Blue</li>
<li>Sleek Green</li>
<li>Sleek Orange</li>
<li>Sleek Purple</li>
<li>Sleek Red</li>
<li>Sleek Yellow</li>
<li>Social Snow</li>
<li>Vintage Postage Stamps</li>
<li>
Yammy
</li>
<li>
Create your own icon sets by adding a folder to the “images/iconset” directory.
</li>
<li>Choose whether links open in a new window.</li>
</ul>
<h3>Arbitrary section</h3>
The icons in this plugin are distributed freely by a 3rd party and either licensed to be used in a personal or commercial capacity under several licenses including the Creative Commons, FastIcon and various other licenses.

Social Icons Widget vs Social Media Icons Widget